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<title>Building a Stock Quoter with TAO - A Tutorial</title>
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<body bgcolor=white lang=EN-US link="#000FFF" vlink="#FF0F0F" style='tab-interval:
.5in'>

<div class=Section1>

<h3 align=center style='margin:0in;margin-bottom:.0001pt;text-align:center;
line-height:150%'><span style='color:black'>Building a Stock Quoter with CIAO,
CoSMIC, and DAnCE - A Tutorial<o:p></o:p></span></h3>

<h3 align=center style='margin:0in;margin-bottom:.0001pt;text-align:center;
line-height:150%'><span style='color:black'><o:p>&nbsp;</o:p></span></h3>

<p style='margin:0in;margin-bottom:.0001pt;line-height:150%'><span
style='color:black'>This tutorial provides a step-by-step lesson on developing
component-based distributed applications using <a
href="http://www.dre.vanderbilt.edu/cosmic/">CoSMIC</a> modeling toolkit and the
<a href="http://www.cs.wustl.edu/%7Eschmidt/CIAO.html">CIAO DAnCE</a>
framework. The example application used in this tutorial is a Stock Quoter that
consists of two components; the <i>StockDistributor</i> and the <i>StockBroker</i>.
The <i>StockDistributor</i> notifies one or more stock brokers whenever a stock
price changes. Upon receiving the notification, the <i>StockBroker</i> fetches
information about a particular stock from the <i>StockDistributor</i>. The
figure bellow shows the application diagram. This Stock Quoter application is
based on a series of <a
href="http://www.cs.wustl.edu/%7Eschmidt/report-doc.html">CORBA component model</a>
columns written by <a href="http://www.cs.wustl.edu/%7Eschmidt/">Doug Schmidt</a>
and <a href="http://www.iona.com/hyplan/vinoski/">Steve Vinoski</a> for <a
href="http://www.cuj.com">C/C++ Users Journal</a> and has consistently been
used as an example for <a href="http://www.cs.wustl.edu/%7Eschmidt/TAO.html">TAO</a>.<o:p></o:p></span></p>

<p style='margin:0in;margin-bottom:.0001pt;line-height:150%'><span
style='color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='color:black'><img border=0 width=434 height=232 id="_x0000_i1025"
src="images/fig1.jpg"><br>
Stock Quoter application Diagram <o:p></o:p></span></p>

<p class=MsoNormal style='line-height:150%'><span style='color:black'><o:p>&nbsp;</o:p></span></p>

<p style='margin:0in;margin-bottom:.0001pt;line-height:150%'><span
style='color:black'>This is a step-by-step tutorial that will walk you through
the development and deployment phases of a CCM application (Stock Quoter). This
tutorial assumes that you have read and understood the following articles that
describe the example:<o:p></o:p></span></p>

<p style='margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.75in;
margin-bottom:.0001pt;text-indent:-.25in;line-height:150%;mso-list:l0 level1 lfo1;
tab-stops:list .75in'><![if !supportLists]><span style='font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span
style='mso-list:Ignore'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><a
href="http://www.cuj.com/documents/s=9039/cujexp0402vinoski/">The CORBA
Component Model, Part 1: Evolving Towards Component Middleware</a></p>

<p style='margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.75in;
margin-bottom:.0001pt;text-indent:-.25in;line-height:150%;mso-list:l0 level1 lfo1;
tab-stops:list .75in'><![if !supportLists]><span style='font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span
style='mso-list:Ignore'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><a
href="http://www.cuj.com/documents/s=9152/cujexp0404vinoski/">The CORBA
Component Model, Part 2: Defining Components with the IDL 3.x Types</a></p>

<p style='margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.75in;
margin-bottom:.0001pt;text-indent:-.25in;line-height:150%;mso-list:l0 level1 lfo1;
tab-stops:list .75in'><![if !supportLists]><span style='font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span
style='mso-list:Ignore'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><a
href="http://www.cuj.com/documents/s=9301/cujexp0409vinoski/">The CORBA
Component Model, Part 3: The CCM Container Architecture and Component
Implementation Framework</a></p>

<p style='margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.75in;
margin-bottom:.0001pt;text-indent:-.25in;line-height:150%;mso-list:l0 level1 lfo1;
tab-stops:list .75in'><![if !supportLists]><span style='font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span
style='mso-list:Ignore'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><a
href="http://www.cuj.com/documents/s=9360/cujexp0410vinoski/">The CORBA
Component Model Part 4: The CORBA Component Model Part 4: Implementing
Components with CCM</a></p>

<p style='margin:0in;margin-bottom:.0001pt;line-height:150%'><span
style='color:black'><o:p>&nbsp;</o:p></span></p>

<p style='margin:0in;margin-bottom:.0001pt;line-height:150%'><span
style='color:black'><span style='mso-spacerun:yes'>&nbsp;</span>In addition to
the articles above, reading and understanding the resources below will greatly
help you follow through this tutorial:<o:p></o:p></span></p>

<p style='margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.75in;
margin-bottom:.0001pt;text-indent:-.25in;line-height:150%;mso-list:l4 level1 lfo2;
tab-stops:list .75in'><![if !supportLists]><span style='font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;color:black'><span
style='mso-list:Ignore'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><a
href="http://www.cs.wustl.edu/~schmidt/PDF/DAnCE.pdf">DAnCE: A QoS-enabled
Component Deployment and Conguration Engine</a><span style='color:black'><o:p></o:p></span></p>

<p style='margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.75in;
margin-bottom:.0001pt;text-indent:-.25in;line-height:150%;mso-list:l4 level1 lfo2;
tab-stops:list .75in'><![if !supportLists]><span style='font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span
style='mso-list:Ignore'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]>TAO&#8217;s Developer&#8217;s Guide Version
1.4a. Chapter 32&nbsp;: CIAO and CCM.</p>

<p style='margin:0in;margin-bottom:.0001pt;line-height:150%'><span
style='color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='line-height:150%'><b><span style='font-size:14.0pt;
line-height:150%;color:black'>Prerequisites:</span></b><b><span
style='font-size:13.5pt;line-height:150%;color:black'><br>
</span></b><span style='color:black'>&nbsp;Before you start, you need the
following: <o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.75in;text-indent:-.25in;line-height:
150%;mso-list:l1 level1 lfo3;tab-stops:list .75in'><![if !supportLists]><span
style='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:
Symbol;color:black'><span style='mso-list:Ignore'>&middot;<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><![endif]><b><span
style='color:black'>ACE+TAO+CIAO (Component Integraated ACE ORB).</span></b><span
style='color:black'> ACE + TAO + CIAO provide the CCM infrastructure necessary
to enable the CCM-based distributed component interaction. You can click <a
href="http://download.dre.vanderbilt.edu">here</a> to download the latest ACE +
TAO + CIAO and click <a
href="http://www.cs.wustl.edu/%7Eschmidt/ACE_wrappers/TAO/CIAO/CIAO-INSTALL.html">here</a>
for information on how to build ACE+TAO+CIAO.<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.75in;text-indent:-.25in;line-height:
150%;mso-list:l1 level1 lfo3;tab-stops:list .75in'><![if !supportLists]><span
style='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:
Symbol;color:black'><span style='mso-list:Ignore'>&middot;<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><![endif]><b><span
style='color:black'>Generic Modeling Environment (GME).</span></b><span
style='color:black'> GME is a configurable toolkit for creating domain-specific
modeling and program synthesis environments. It provides the execution
environment for CoSMIC toolkits. Click <a
href="http://www.isis.vanderbilt.edu/Projects/gme/download.html">here</a> to
download GME.<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.75in;text-indent:-.25in;line-height:
150%;mso-list:l1 level1 lfo3;tab-stops:list .75in'><![if !supportLists]><span
style='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:
Symbol;color:black'><span style='mso-list:Ignore'>&middot;<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><![endif]><b><span
style='color:black'>CoSMIC toolkit.</span></b><span style='color:black'> Click <a
href="http://www.dre.vanderbilt.edu/cosmic/">here</a> to download the latest
CoSMIC release.<o:p></o:p></span></p>

<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>

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style='color:black'>

<hr size=2 width="100%" align=center>

</span></div>

</div>

<p class=MsoNormal style='margin-left:-.5in;line-height:150%'><strong><span
style='color:black'>Note:</span></strong><strong><span style='font-weight:normal'><o:p></o:p></span></strong></p>

<p class=MsoNormal style='margin-left:0in;text-indent:-.25in;line-height:150%;
mso-list:l3 level1 lfo4;tab-stops:list 0in .5in'><![if !supportLists]><b
style='mso-bidi-font-weight:normal'><span style='mso-list:Ignore'>1.<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp; </span></span></b><![endif]><span
style='color:black'>Usually you should download the latest GME, but it is possible
that CoSMIC hasn't been updated yet to support the very latest GME..The
installation process of CoSMIC will tell you which version it is
expecting.&nbsp; So <span class=intbody>please make sure the GME version you
are using is the version required by CoSMIC. A different version of </span>GME
may result in undefined errors. </span></p>

<p class=MsoNormal style='margin-left:0in;text-indent:-.25in;line-height:150%;
mso-list:l3 level1 lfo4;tab-stops:list 0in .5in'><![if !supportLists]><b
style='mso-bidi-font-weight:normal'><span style='color:black'><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span></b><![endif]><span style='color:black'>Make sure you
install GME first before you start with CoSMIC toolkits.<o:p></o:p></span></p>

<div style='margin-left:-.5in'>

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style='color:black'>

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</blockquote>

<p class=MsoNormal style='line-height:150%'><span style='color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='line-height:150%'><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt;line-height:150%;color:black'>Steps for
Developing the Stock Quoter Application:<o:p></o:p></span></b></p>

<p class=MsoNormal style='line-height:150%'><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt;line-height:150%;color:black'><o:p>&nbsp;</o:p></span></b></p>

<p class=MsoNormal align=center style='text-align:center;line-height:150%'><b
style='mso-bidi-font-weight:normal'><span style='font-size:14.0pt;line-height:
150%;color:black'><img border=0 width=960 height=521 id="_x0000_i1028"
src="images/steps.jpg"><o:p></o:p></span></b></p>

<p class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='color:black'>Steps for Developing Stock Quoter Application<o:p></o:p></span></p>

<p class=MsoNormal style='line-height:150%'><span style='color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='line-height:150%'><span style='color:black'>Listed
below are the steps for developing the Stock Quoter application. Each link is a
step-by-step tutorial of the specific step.</span><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt;line-height:150%;color:black'><o:p></o:p></span></b></p>

<ol style='margin-top:0in' start=1 type=1>
 <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level1 lfo5;
     tab-stops:list .5in'><b><a href="01.html">Define your interfaces and
     component types</a>:</b><o:p></o:p></li>
 <ol style='margin-top:0in' start=1 type=a>
  <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level2 lfo5;
      tab-stops:list 1.0in'><b>Define your interfaces using IDL 2.x features</b>,
      e.g., use the familiar CORBA types (such as <span style='mso-bidi-font-weight:
      bold'>struct</span>, <span style='mso-bidi-font-weight:bold'>sequence</span>,
      <span style='mso-bidi-font-weight:bold'>long</span>, <span
      style='mso-bidi-font-weight:bold'>Object</span>, <span style='mso-bidi-font-weight:
      bold'>interface</span>, <span style='mso-bidi-font-weight:bold'>raises</span>,
      etc.) to define your interfaces &amp; exceptions.<o:p></o:p></li>
  <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level2 lfo5;
      tab-stops:list 1.0in'><b>Define your component types using IDL 3.x
      features</b>, e.g., use the new CCM keywords (such as <span
      style='mso-bidi-font-weight:bold'>component</span>, <span
      style='mso-bidi-font-weight:bold'>provides</span>, <span
      style='mso-bidi-font-weight:bold'>uses</span>, <span style='mso-bidi-font-weight:
      bold'>publishes</span>, <span style='mso-bidi-font-weight:bold'>emits</span>,
      &amp; <span style='mso-bidi-font-weight:bold'>consumes</span>) to group
      the IDL 2.x types together to form components.<b><o:p></o:p></b></li>
 </ol>
 <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level1 lfo5;
     tab-stops:list .5in'><b><a href="02.html">Implement your components</a></b>,
     e.g., using C++ or Java &amp; the Component Implementation Definition
     Language (CIDL), which generates component servants, executor interfaces,
     associated metadata, &amp; compositions.<b><o:p></o:p></b></li>
 <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level1 lfo5;
     tab-stops:list .5in'><b style='mso-bidi-font-weight:normal'><a
     href="03.html">Package your components</a></b>, <span style='color:red'>[Ming,
     can you add a brief description here?]</span><b><o:p></o:p></b></li>
 <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level1 lfo5;
     tab-stops:list .5in'><b><a href="03.html">Assemble your components</a></b>,
     e.g., group related components together &amp; characterize their metadata
     that describes the components present in the assembly.<span
     style='mso-bidi-font-weight:bold'><o:p></o:p></span></li>
 <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level1 lfo5;
     tab-stops:list .5in'><b style='mso-bidi-font-weight:normal'><a
     href="03.html">Plan your deployment</a></b>, <span style='color:red'>[Ming,
     can you add a brief description here?]</span><span style='mso-bidi-font-weight:
     bold'><o:p></o:p></span></li>
 <li class=MsoNormal style='color:black;line-height:150%;mso-list:l2 level1 lfo5;
     tab-stops:list .5in'><b><a href="04.html">Deploy your components &amp; run
     your application</a></b>, e.g., move the component assembly packages to
     the appropriate nodes in the distributed system &amp; invoke operations on
     components to perform the application logic.<b style='mso-bidi-font-weight:
     normal'><o:p></o:p></b></li>
</ol>

<div class=MsoNormal align=center style='text-align:center;line-height:150%'><span
style='color:black'>

<hr size=2 width="100%" align=center>

</span></div>

<address style='line-height:150%'><a href="mailto:ming.xiong@vanderbilt.edu">Ming
Xiong<br>
</a><a href="mailto:abdullah.sowayan@lmco.com">Abdullah Sowayan</a></address>

</div>

</body>

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